Siemens / ITE FJ3B12500S01 Molded Case Circuit Breaker
- 125A
- 3 Pole
- Bolt-On
Quantity
Siemens / ITE FJ3B12500S01 - 125A 3 Pole Molded Case Circuit Breaker
Re-Certified
Quantity
Description
Providing reliable thermal-magnetic protection alongside remote disconnect functionality, this 125A F-frame breaker comes equipped with a pre-installed shunt trip. It fastens securely into vintage Siemens and ITE F1, F2, and SB series distribution equipment. This exact-match component allows electrical contractors to service older commercial infrastructure efficiently, bypassing the need for specialized mounting kits that are mandatory when installing the newer FXD63B125 substitute models.Specifications
| Brand | Siemens / ITE |
|---|---|
| Part Number | FJ3B12500S01-R |
| Series | FJ |
| Amperage | 125A |
| Poles | 3 |
| Mounting Style | Bolt-On |
| Voltage | 240VAC, 480VAC, 600VAC, 250VDC |
| Phase | 3 |
| AIC Rating | 25kA @ 240VAC, 14kA @ 480VAC, 14kA @ 600VAC, 10kA @ 250VDC |
| Terminal Type | Lugs |
|---|---|
| For Use With | Siemens / ITE F1, F2, SB1, SB2, SB3 Panelboards and Switchboards |
| Wire Gauge | 6 AWG - 350 kcmil (Cu/Al) |
| Max Wire | 350 kcmil |
| Min Wire | 6 AWG |
| Trip Technology | Thermal Magnetic |
|---|---|
| Trip Function Code | LI |
| Trip Function | Long-Time, Instantaneous |
| Trip Adjustability | Fixed Thermal, Fixed Magnetic |
| Available Options | Auxiliary Switch, Undervoltage Release, Alarm Switch, Padlock Attachment |
|---|---|
| Accessories | Shunt Trip (Factory Installed), Line and Load Lugs Included |
| Standards | UL 489, NEMA AB-1, CSA C22.2 No. 5 |
| Approval | CSA, UL |
| Temp Rating | 40C |
| Construction Features | Non-Interchangeable Trip |
Product FAQs
6 answersWhat does the S01 suffix indicate on the FJ3B12500S01 catalog number?
The S01 suffix designates a factory-installed 120VAC shunt trip accessory. This allows the breaker to be opened remotely from a control circuit for emergency power-off or equipment interlocks.
Which panelboards and switchboards accept the FJ3B12500S01 breaker?
This F-frame breaker is designed to bolt directly into legacy Siemens and ITE F1, F2, SB1, SB2, and SB3 panelboards and switchboards.
Is the FJ3B12500S01 a direct replacement for older ITE FJ frame breakers?
Yes, this unit serves as an exact physical and electrical match for vintage ITE and Siemens FJ frame breakers. It allows you to service older commercial infrastructure without the specialized mounting kits required for newer FXD63B125 substitute models.
Can the shunt trip accessory on the FJ3B12500S01 be modified or added in the field?
No, the 120VAC shunt trip is factory-installed and cannot be added or modified in the field. Ensure your control circuit voltage matches the 120VAC coil requirement before installation.
What safety precautions apply when installing this bolt-on circuit breaker?
Always de-energize the panelboard or switchboard before installation. Verify that the system voltage does not exceed the 600VAC or 250VDC maximum ratings of the breaker, and follow all local electrical codes and lockout/tagout procedures.
Where are the correct lug torque specifications located for the FJ3B12500S01?
Lug torque requirements are printed directly on the circuit breaker faceplate label. Always use a calibrated torque wrench to tighten the load side lugs to the manufacturer specified values to prevent thermal failure.
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Reviews
Review summary
Customers rate this product 5.0 out of 5 based on 3 reviews.
- JMJoseph M.Verified BuyerReviewingSiemens / ITE FJ3S225 - 225A 3 Pole Molded Case SwitchI recommend this productRated 5 out of 5 stars3/20/26Siemens / ITE FJ3S225 - 225A 3 Pole Molded Case Switch
Correct item.
- BGBrad G.ReviewingSiemens / ITE FJ3B200 - 200A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars5/19/21Great Service
We have had great luck with this company!! Great shipping and excellent customer service!
- CGClyde G.ReviewingSiemens FJ3B225 - 225A 3 Pole Molded Case Circuit BreakerI recommend this productRated 5 out of 5 stars3/8/18Had good results with your
Had good results with your people they was very helpful. Shipping was good and on time and products was right.